﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Bai06_Sharp
{
    class Program
    {
       static void Main(string[] args)
       {
           Rectangle rect = new Rectangle(8, 9);
           Console.WriteLine("rect:{0}", rect.area());
           return;
       }
    }
}
